Updated the Android example Source application.
AJAUDIO-11: Call FindAdvertisedName asynchronously from Announce
signal handler callback.

If called synchronously, we'll run out of concurrent callbacks when
more than 4 Announce signals arrive before the FindAdvertisedName
method calls complete.

Change-Id: I5c6f1a113292a8fd220322bde2b7fa2a259f33b3
Removed the old Source application and library code.
Build the Android samples from the command line.

Change-Id: I074842d05f9ba39113ab2cbd8602d275b7492a9b